So I finally made a mission that's actually a mission and I'd like to mention it for the people interested in trying it.
I have 5 reviews on it so far so it's viewable by public (Even tho I created my own teams to play and show it around). I had some decent reviews and a few things that could be improved (which I did). If you're interested in trying it, just search Killua and you'll find it (I think you need minimum rank 41).
The mission is a lot more interesting with 3-5 players, so if you have friends that want to test it with you, that'd be great.